• Summary
• Text account
• Data table and detailed info
• Map
• Reference and further resources

The site was identified as important in 2007 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species'):

Species	Current IUCN Red List Category	Season	Year(s)	Population estimate at site	IBA criteria met
Red-billed Chough Pyrrhocorax pyrrhocorax	LC	breeding	2002	16 breeding pairs	B2

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2007).

Response (conservation actions taken for the trigger species and/or their habitats)
Protected-area designation	Management planning	Other conservation action	Result
Little/none of site covered (<10%)	Unknown	Not assessed	negligible

For more information about IBA conservation status, please click here

Protected area (PA)	PA designation	PA area (ha)	Relationship of PA with IBA	Overlap of PA with IBA (ha)
Yr Eifl	Site of Special Scientific Interest (UK)	425	protected area contained by site	423
Yr Eifl	National Nature Reserve	39	protected area contained by site	0
Porth Dinllaen i Borth Pistyll	Site of Special Scientific Interest (UK)	129	protected area overlaps with site	0
Pistyll	Nature Reserve	17	protected area overlaps with site	0
Llyn Coast	Heritage Coast	20	protected area overlaps with site	0
Llyn	Area of Outstanding Natural Beauty	15,984	protected area overlaps with site	0
Lleyn (Llyn)	Area of Outstanding Natural Beauty	0	protected area overlaps with site	4,554
Gwydir Bay	Site of Special Scientific Interest (UK)	55	protected area contained by site	0
Glynllifon	Site of Special Scientific Interest (UK)	193	protected area is adjacent to site	0
Glynllifon	Site of Community Importance (Habitats Directive)	187	protected area is adjacent to site	0
Gallt-y-Bwlch	Site of Special Scientific Interest (UK)	23	protected area contained by site	0
Dinas Dinlle	Nature Reserve	12	protected area contained by site	0
Dinas Dinlle	Site of Special Scientific Interest (UK)	26	protected area contained by site	0
Corsydd Eifionydd	Site of Community Importance (Habitats Directive)	144	protected area overlaps with site	0
Cors y Wlad	Site of Special Scientific Interest (UK)	26	protected area overlaps with site	0
Coed Elernion	Site of Special Scientific Interest (UK)	17	protected area contained by site	0
Coed Cwmgwared	Site of Special Scientific Interest (UK)	29	protected area contained by site	0
Clogwyni Pen Llŷn/ Seacliffs of Lleyn	Site of Community Importance (Habitats Directive)	1,045	protected area overlaps with site	0
Carreg y Llam	Site of Special Scientific Interest (UK)	14	protected area contained by site	0
Cappas Lwyd	Site of Special Scientific Interest (UK)	7	protected area contained by site	0
Caeau Tan-y-Bwlch	Nature Reserve	6	protected area overlaps with site	0
Caeau Tan y Bwlch	Site of Special Scientific Interest (UK)	6	protected area overlaps with site	0

Habitat (IUCN level 1)	Habitat detail	Extent (% of site)
Marine Coastal/Supratidal		-

For more information about the IUCN Habitat classification, please click here.

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Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Trefor. Downloaded from http://datazone.birdlife.org/site/factsheet/trefor-iba-united-kingdom on 03/10/2023.